1 // negate.hpp 2 // 3 // (C) Copyright 2011 Vicente J. Botet Escriba 4 // Use, modification and distribution are subject to the Boost Software License, 5 // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at 6 // http://www.boost.org/LICENSE_1_0.txt). 7 // 8 9 #ifndef BOOST_RATIO_MPL_NEGATE_HPP 10 #define BOOST_RATIO_MPL_NEGATE_HPP 11 12 #include <boost/ratio/ratio.hpp> 13 #include <boost/ratio/mpl/numeric_cast.hpp> 14 #include <boost/mpl/negate.hpp> 15 16 namespace boost { 17 namespace mpl { 18 19 template<> 20 struct negate_impl< rational_c_tag > 21 { 22 template< typename R > struct apply 23 : ratio_negate<R> 24 { 25 }; 26 }; 27 } 28 } 29 30 #endif // BOOST_RATIO_MPL_NEGATE_HPP 31